Date: Sat, 25 Dec 2021 11:55:10 GMT From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: b916d2b31c4c - stable/12 - Merge llvm commits for kernel address and memory sanitizer support Message-ID: <202112251155.1BPBtAHU006138@gitrepo.freebsd.org>
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The branch stable/12 has been updated by dim: URL: https://cgit.FreeBSD.org/src/commit/?id=b916d2b31c4ca1b52ffb1170280212685675880d commit b916d2b31c4ca1b52ffb1170280212685675880d Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2021-04-27 19:18:13 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2021-12-25 11:51:00 +0000 Merge llvm commits for kernel address and memory sanitizer support Merge commit 99eca1bd9c7a from llvm git (by Mark Johnston): [Driver] Enable kernel address and memory sanitizers on FreeBSD Test Plan: using kernel ASAN and MSAN implementations in FreeBSD Reviewed By: emaste, dim, arichardson Differential Revision: https://reviews.llvm.org/D98286 Merge commit f511dc75e4c1 from llvm git (by Mark Johnston): [asan] Add an offset for the kernel address sanitizer on FreeBSD This is based on a port of the sanitizer runtime to the FreeBSD kernel that has been commited as https://cgit.freebsd.org/src/commit/?id=38da497a4dfcf1979c8c2b0e9f3fa0564035c147 and the following commits. Reviewed By: emaste, dim Differential Revision: https://reviews.llvm.org/D98285 Requested by: markj MFC after: 3 days (cherry picked from commit 1b00608b264f1fac846e571e23d8ef7134834638) --- contrib/llvm-project/clang/lib/Driver/ToolChains/FreeBSD.cpp | 8 +++++++- .../llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp | 10 +++++++--- 2 files changed, 14 insertions(+), 4 deletions(-) diff --git a/contrib/llvm-project/clang/lib/Driver/ToolChains/FreeBSD.cpp b/contrib/llvm-project/clang/lib/Driver/ToolChains/FreeBSD.cpp index 57744bac37da..c14f34b6107c 100644 --- a/contrib/llvm-project/clang/lib/Driver/ToolChains/FreeBSD.cpp +++ b/contrib/llvm-project/clang/lib/Driver/ToolChains/FreeBSD.cpp @@ -462,6 +462,7 @@ bool FreeBSD::IsUnwindTablesDefault(const ArgList &Args) const { return true; } bool FreeBSD::isPIEDefault() const { return getSanitizerArgs().requiresPIE(); } SanitizerMask FreeBSD::getSupportedSanitizers() const { + const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64; const bool IsX86 = getTriple().getArch() == llvm::Triple::x86; const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64; const bool IsMIPS64 = getTriple().isMIPS64(); @@ -480,8 +481,13 @@ SanitizerMask FreeBSD::getSupportedSanitizers() const { Res |= SanitizerKind::Fuzzer; Res |= SanitizerKind::FuzzerNoLink; } - if (IsX86_64) + if (IsAArch64 || IsX86_64) { + Res |= SanitizerKind::KernelAddress; + Res |= SanitizerKind::KernelMemory; + } + if (IsX86_64) { Res |= SanitizerKind::Memory; + } return Res; } diff --git a/contrib/llvm-project/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/contrib/llvm-project/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp index 1557fad4d372..5ce21cc3616a 100644 --- a/contrib/llvm-project/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp +++ b/contrib/llvm-project/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp @@ -107,6 +107,7 @@ static const uint64_t kMIPS64_ShadowOffset64 = 1ULL << 37; static const uint64_t kAArch64_ShadowOffset64 = 1ULL << 36; static const uint64_t kFreeBSD_ShadowOffset32 = 1ULL << 30; static const uint64_t kFreeBSD_ShadowOffset64 = 1ULL << 46; +static const uint64_t kFreeBSDKasan_ShadowOffset64 = 0xdffff7c000000000; static const uint64_t kNetBSD_ShadowOffset32 = 1ULL << 30; static const uint64_t kNetBSD_ShadowOffset64 = 1ULL << 46; static const uint64_t kNetBSDKasan_ShadowOffset64 = 0xdfff900000000000; @@ -489,9 +490,12 @@ static ShadowMapping getShadowMapping(Triple &TargetTriple, int LongSize, Mapping.Offset = kPPC64_ShadowOffset64; else if (IsSystemZ) Mapping.Offset = kSystemZ_ShadowOffset64; - else if (IsFreeBSD && !IsMIPS64) - Mapping.Offset = kFreeBSD_ShadowOffset64; - else if (IsNetBSD) { + else if (IsFreeBSD && !IsMIPS64) { + if (IsKasan) + Mapping.Offset = kFreeBSDKasan_ShadowOffset64; + else + Mapping.Offset = kFreeBSD_ShadowOffset64; + } else if (IsNetBSD) { if (IsKasan) Mapping.Offset = kNetBSDKasan_ShadowOffset64; else
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